Thread: Troubleshooting a dead pre-amp
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Old 7-May-2019, 6:54 PM   #6
Tower Guy
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Join Date: Dec 2009
Location: Delmar, NY
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The LNA-200 appears to amplify UHF and VHF separately. Q2 is the UHF amp. Q1 is the VHF amplifier. While both could be bad, if the amp works in VHF but not UHF, change only Q1. If it works on UHF but not VHF, change only Q2.
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